@conference {malvido06barcodes, title = {A novel model for the print-and-capture channel in 2D bar codes}, booktitle = {International Workshop on Multimedia Content Representation, Classification and Security}, series = {Lecture Notes in Computer Science}, volume = {4105}, year = {2006}, month = {September}, pages = {627-634}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, address = {Istambul, Turkey}, keywords = {bar-codes, visible-encryption}, author = {Alberto Malvido and Fernando P{\'e}rez-Gonz{\'a}lez and Armando Cousi{\~n}o}, editor = {Bilge Gunsel and Anil K. Jain and A. Murat Tekalp and B{\"u}lent Sankur} }